Shingle dipping machine



Jan. 18, 1949. w. s. smwsu.

SHINGLE DIPPING MACHINE Filed Feb. 25, 1946 I INVENTOR Waist 5. 3M

ATTORNEY 2 Sheets-Sheet l .BZWS wm m Jan. 18, 1949. v w. s. SIDWELL SHINGLE DIPPING MACHINE 2 Sheets-Sheet 2 Filed Feb; 25, 1946 INVENTOR was! 5. 'fiz/ed BY A RNEY IIllllllllllIIIIIII/lllllllllll'lllllfIIIIII Patented Jan. 18, 1949 SHINGLE DIPPIN G MACHINE Webster S. Sidwcll, Los Angeles, Calif., assignor to Evertite Roof Corporation, Los Angelcs, Calii'., a corporation of California Application February 25, 1946, Serial N0. 650,086

12 Claims.

This invention relates to machines for dipping shingles and pertains more particularly to machines for treating the edges of composition shingles, a particular object of the invention being to provide simple and effective means of applying treatment of even consistency and area to such shingles to protect and otherwise improve the edges thereof.

Reference is here made to Patent No. 2,234,446, granted March 11, 1941, to Theophilus G. Murphy, for a composition shingle and roof formed therefrom. In said patent there is disclosed a method of forming a root from composition shingles made of a felt base impregnated with waterproofing compounds and covered with an asphaltic surfacing in which mineral granules are imbedded. Such shingles are usually cut from sheets of roofing material after the waterproofing and surfacing treatment of the sheet, which results in the edges of the cut shingles being unsurfaced and thereby exposed to damage by sun, rain, and wind. To protect the edges of the shingles, to stiffen them, and to provide a thickened marginal portion which will deflect water away from the exposed joints between shingles, at least those edges which will be exposed when the shingles are laid as a roof are given an additional cover of asphaltic compound in which more mineral granules are imbedded. This added cover extends inwardly on the faces of the shingle from the edges thereof for fixed and uniform distances on all the shingles composing a roof, forming marginal reinforcements uniform to all the shingles, it being usually preferable to have the width of the reinforcement on the lower margin of the shingle a little wider than that on the lateral margin.

A device is disclosed in the aforesaid patent for applying to shingles a marginal covering of asphaltic compound and mineral granules, comprising troughs filled with said materials into which the shingles may be clipped. This present invention is in the nature of an improvement on said device, it having been found that the hot asphalt which is first applied to the shingles tends to drip from the edges thereof into the mineral granules and to form agglomerates which may attach themselves to subsequently dipped shingles or which may collect in the trough holding the granules to the point where they resist the dipping of subsequent shingles in the granules to a depth sufficient to cover the previously applied asphalt. It will be understood that the present invention is applicable to the treatment of any 2 shingles and not merely to shingles such as form the roof described in the aforesaid patent.

It is an important object of this invention to provide means for covering the edge of a shingle with a layer of asphaltic compound to a predetermined width and for then covering said asphaltic layer with an even layer of mineral granules.

Another object of the invention is to provide means for so agitating the mineral granules as to keep them in a fluent condition permitting the edge of a shingle to be dipped therein.

A further object of the invention is to provide means for separating the agglomerates formed by loose asphaltic drops and mineral granules from the dry granules and for removing the agglomerates to prevent them from clogging a container holding the dry granules and from adhering to shingles dipped therein.

Still another object of the invention is to provide a conveyor system combined with the aforesaid agitating and separating means for recirculating the dry granules separated from the a glomerates so that the granules may be repeatedly utilized until lomerated 0r adhered to the shingles. Yet another object of the invention is to provide simple unit means for adjusting the aforesaid combined agitating andconveying means to optimum conditions.

Further objects of the invention will be apparent from or will be specifically pointed out in the following description of one embodiment of the invention, illustrated in the accompanying drawings, of which:

Fig. 1 is a side elevational view of one form of the invention;

Fig. 2 is a transverse section taken on the line 2-2 of Fig. 1, and on an enlarged scale;

Fig. 3 is a fragmentary sectional View taken on the line 3-3 of Fig. 2, showing details of the agitating mechanism; and

Fig. 4 is a sectional view taken on line 4-4 of Fig. 1 on the same scale as Figs. 2 and 3 show ing parts of the separating mechanism.

Referring particularly to Figs. 1 and 2, a frame H supports by angle irons i2 a vessel l3, preferably shaped as a rectangular tray and having supporting flanges i 4 extending outwardly beyond the angle irons I 2 and then downwardly as shown at l5. A pan IB is also supported by the angle irons 12 below the vessel l3, enclosing a combustion space I I in which are burners I8 fed by fuel lines IS. A channel iron 2| supported by the ends of the vessel l3 may pivotally carry a pair of covers 22, shown in their open position in which they may be held by a U-shaped clamp 23. A

3 vent hood 24 may be provided to exhaust the fumes from a body of asphaltic compounds 28 contained in the vessel l3. Shelves 2-8 in the lateral lower margins of the Vessel l3 provide therein lateral portions of a desired depth less than the central portion of said vessel.

Means are provided to establish and maintain a supply of granules within which shingles may be dipped, in connection wherewitn a motor 3| may be provided to drive an eccentric 32, upon which is mounted a pitman 33. The end 34 of the pitman 33 is threaded to receive nuts 35am! 38 and passes slidably through a collar 31 attached to a crosshead 38, being resiliently positioned with respect to the crosshead by springs 38 and 39a adjustably held thereagainst by the nuts 35 and 36, such nuts being advantageously of the so-called stop-nut type to facilitate re.- tention thereof in any desired adjusted position. It will be seen that, as the pitman end 34 is slidable within the collar 31, the push and pull of the pitman is delivered to the collar and thence to the crosshead 38 through the springs 39 and 39a.

The spring 39, on the side of the collar 31 toward the eccentric 32, is preferably a stronger spring than spring 39a, 50 that the push deliverable by the pitman against the crosshead 38 outwardly from the eccentric is more positive and abrupt than the pull against the crosshead on the reverse stroke.

A pair of rocker arms 4| are joined at theirv lower ends by the crosshead 38 and pivoted adjacent their mid-points on a shaft 42 supported by iongitudinal members 43 of the frame A second pair of rocker arms 44 are likewise pivot lly mounted, as shown at 45, on the frame members 43 and are joined at their lower ends by a crosshead 46. Crossheads 38 and 46 are rotatable with respect to the rocker arms 4| and 44, being connected thereto through bearings 41 as shown in Fig. 2. The upper ends of rocker-arm 4| and 44 pivotally support, as by journals 48, troughs 49 and 58 placed at a convenient level at the respective sides of the vessel l3. It will be seen that arcuate oscillation of the rocker arms 4| will cause end-wise arcuate oscillation of the troughs 49 and 58 and arcuate oscillation of the supporting rocker arms 44, the end-wise movement of the troughs being accompanied by a rising and falling movement along arcs concentric to those traversed by the journals 48. The inner sides 5| and 52 of the troughs 49 and 58 preferably extend upwardly between the angle irons l2 and the flanges I5 of the vessel l3, being slidable therebetwen so as to guide the troughs and to prevent lateral movement thereof.

An inclined pan 53 is supported at its lower end by the crosshead 46 and at its upper end by arms 54 extending upwardly from crosshead 38. The pan 53 has at its upper end a receiving tray 55 and at its lower end a discharge chute 56' and supports an inclined screen 5'! having a lateral discharge chute 58 at its lower end. Troughs 49 and 58 are provided with end chutes of which one is represented at 59, opening onto the receiving tray 55. The discharge chute 58 opens to a waste receiver, not shown, and the discharge chute 58 opens to a. hopper 6|, feeding to a bucket elevator 82 which may be driven by the motor 3|. The bucket elevator 62 discharges into a hopper 63 which in turn discharges by gravity through lateral chutes 64 at the respective sides of the structure to the troughs 49 and 50, thereby completing a circuit for such materials as are passed through the screen 51 onto the pan 53.

to be deposited at some given level and thereby establish a desired depth of material in the trough. According to conventional practice in this connection, the discharge end of the chute may be made adjustable, for regulation of suchmaterial depth.

As thecrossheads 38 and 48 oscillate in unison and as the pan 83 is supported by these two members, the pan and the screen 81 will be given an arcuate reciprocating movement. It is desirable to have the pan and screen inclined at a substantial angle to the horizontal, and the side walls of the pan may be raised above the shaft 42 without interference therewith by providing them with slots 86 through which'the shaft extends, thus allowing for movement of the pan relative to the shaft.

As hereinbefore stated, the push delivered by the pitman 33 upon the crosshead 38 is preferably more positive and abrupt than the pull delivered thereon, as obtained by the difference in strength of the springs 39 and 39a. Consequently the troughs 49 and are moved more vigorously towards the left as viewed in Fig. 1, that is to say towards the hopper 8| and chutes 84, than to-. wards the right. As is well known in the art of vibratory conveyors, the arcuate movement of differential vigor will cause material in the troughs to advance in the direction. of the less vigorous stroke, the material having a tendency to remain in contact with the trough during that stroke and to hold its position in space when the trough is abruptly moved under it. This advancement is aided when the arcuate movement is such that the end of the arc terminating the less vigorous stroke is higher than the end of the arc terminating the abrupt stroke, and preferably at the highest point of the arc, so as to obtain the fullest advantage from the forces of inertia and gravity. Those familiar with the art are aware that, given a vibration of periodicity suitable to the material to be conveyed, optimum conditions may be obtained by suitableadjustment of the length of the oscillatory stroke, of the springs dampening the vibration and of the angle to the horizontal of the chord subtending the arc of movement of the conveyor.

In my invention, all of'the aforesaid adjustments for optimum conditions may be made by adjustment of the nuts 35 and 38 upon the pitman 33. The pitman being slidable within the collar 31, movement of the nuts 35 and 38 in unison inwardly or outwardly upon the pitman 33 will change the mean position of the crosshead 38 relative .to the shaft 42 and thereby change the angle with the horizontal of the chord subtending the are through which the journals 48 are moved. Movement of either of the nuts alone will change the initial compression upon the springs 39 and 39a and thereby alter the dampening effect of said springs upon the vibratory movement, and. by reason of the impositive and resilient connection between the pitman 33 and collar 31, alter the length of the oscillatory stroke. In practice, the last-named adjustment is made first, and the length of stroke and the dampening effect having beensatisfactorily correlated, the two nuts are moved in unison to obtain the desired mean inclination of the rocker arms 4| from the vertical. The rocker arms 44 are ailected by the same adjustment, being held The screen all and pan 53, which receive materials from the troughs s9 and d, convey said materials in the direction opposite-to that in which said materials are moved in the troughs, and therefore they are appropriately attached to the rocker arms all and id below the shafts 32 and ,5 where they receive the less vigorous and more abrupt movements in directions reversed to the movements of the troughs. However, if the mean position of the rocker arms 58 is at an angle calculated to bring the journals 38 to their high est position at the end of the less vigorous stroke, the crossheads 88 and 56, supporting the pan and screen, will be at their lowest position at the end oi the same stroke. This, of course, could be avoided by suitably bending the rocker arms, which would result in an increase in the load upon the driving mechanism which would then have to lift the troughs and the pan and screen simultaneously, whereas as here shown they are in some degree of balance. To cause movement of the material in the desired direction the screen 3*? and pan 53 are thereiore inclined at a substantial angle, which in cooperation with the vibratory movement, will cause the materials upon them to move downwardly regardless oi the upward movement during the more abrupt stroke.

To illustrate more completely the operation or my invention, 1 have shown in Fig. i a stand ii upon which is mounted a conveyor belt l2 which may be driven by suitable connecting means from the motor at. A roller l3 extends across the belt 32, held in a bracket it pivotally supported by the stand ii so that the roller is biased by gravity to press against the belt, the pressure being ac centuated when the roller is in the position illustratecl by the pull of the belt moving in the direction or the arrow. A receiving table it receives articles discharged from the belt 72.

when a supply of liquified asphaltic compound is in the vessel l8, and a supply of mineral granules is in the troughs A38 and so and the hopper shingles indicated in broken lines at El in Fig. 2 are dipped marginally in the vessel 83, the shell 26 serving as a gauge. The edges of the shingles are then dipped in the troughs c9 and lit where the mineral granules present in said troughs adhere to the asphaltic compound, and

the shingles are placed upon the belt '52 where the roller l3 rolls the granules into the compound.

Borne of the asphaltic compound on the margins oi the shingles will drop therefrom into the troughs 59 and so, forming agglomerates with the granules therein. The granules, unless in a fluid state, will resist the entry of the edges of the shingles, and this resistance is fortified by the presence of agglomerates. When the troughs 69 and N are oscillated arcuately, as hereinbei'ore described, the granules are maintained in a fluid moving state which permits the shingles to be easily dipped therein. The unused granules, to-

gether with the agglomerates, are moved by the arcuate oscillations of the troughs to the end chutes l8 and thence by gravity to the receiving tray 55 and screen s1. The clean granules silt through the screen 51 to the pan 5: and thence. by the discharge chute SI, hopper Cl, elevator l2 and hopper '3 they recirculate to the troughs 49 and II. The agglomerates separated by the screen 81 are discharged therefrom bythe lateral discharge chute II. w

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Numerous modifications may be made in the arrangement of parts in the herein described embodiment of my invention, hence I do not'choose to be limited tothe exact embodiment as described and illustrated, but rather to the scope of the appended claims. For example, while the illustrated form of vibratory conveying and screening apparatus has been found to be highlyadvantageous as a combined unit for the purposes of this invention, particularly adapted to the requirements thereof, I may employ separate vibratory actuating means for the troughs lid-5Q and the screen 5?, such as electromagnetic actuating means, an example of which as applied to av screening device may be found in U. S. Patout No. 2,144,173, without departing from the broad concept of my invention.

Iclaim:

1. In a machine for dipping shingles, the combination of: a vessel for holding liqulfied asphaltic compounds; means within said vessel for limiting the depth to which a shingle may be dipped -.therein; a trough having an inlet end and an outlet end, and adapted to hold mineral granules wherein said shingles may be subseuuently dipped; agitating means operatively con nected with said trough for arcuate oscillationthereof in a vertical plane whereby said granules are maintained in a fluid state receptive to said shingles and are moved toward said outlet end: screening means adapted to receive said granules from said outlet end and to separate from said granules any asphaltic-granule, agglomerates resulting from dipping shingles into such granules, said screening means being operatively connected to said agitating means for agitation thereby; and means for conveying said separated granules from said screening means to said inlet end of said trough.

2. In a machine for dipping shingles, the combination of: a vessel for holding liquifled asphaltic compounds wherein shingles, may be dipped to a predetermined depth; a trough having an inlet, end and an outlet end, for containing a stream of mineral granules wherein said shingles may be subsequently dipped; agitating means for moving said stream of granules toward said outlet end; screening means adapted to receive said granules from said outlet end and to separate from said granules any asphalticgranule agglomerates resulting from dipping shingles into such granules; means for conveying the separated granules to said inlet end for recirculation.

3. In a machine for dipping shingles, the combination of: a vesselsfor holding liquified asphaltic compounds; means within said vessel for limiting the depth to which a shingle may be clipped therein; a trough having an inlet end and an outlet end, for containing a stream of mineral granules wherein said shingles may be subsequently dipped; agitating means operatively connected with said trough for arcuate oscillation thereof in a vertical plane whereby said granules are maintained in a fluid state receptive to said shingles and are moved toward said outlet end; means for receiving said granules from said outlet end and forsifting them; and means for conveying the sifted granules to said inlet end for recirculation.

4. In a machine for dipping shingles, the combination of: means for applying liquiiied asphaltic compounds to a. marginal portionofa shingle; means having an inlet end and an outlet end tor holding mineral granules; means for so agitating said last mentioned means as to maintain said granules in a fluid state receptive to said shingles and to move said granules toward said outlet end means for receiving said granules and any formed asphaltic-granule agglomerates from said outlet end and for separating said granules from said agglomerates; and means for conveying the separated granules to said inlet end for recirculation.

5. In a machine wherein shingles are marginally coated with liquified asphaltic compounds and subsequently dipped into mineral granules, granule circulating apparatus comprising: a vibratory conveying and sifting unit inclusive of a trough, sifting means posited to receive said granules by gravity from one end of said trough, a shaft, and rocker arms pivotally connected to said trough and said sifting means and pivotally mounted intermediate thereof upon said shaft; driving means; means operably connecting said driving means with said unit to cause rapid arcuate oscillation of said unit; and means for returning granules which have been sifted by said sifting means to the other end of said trough.

6. In a machine wherein shingles are marginally coated with liquified asphaltic compounds and subsequently dipped into mineral granules, granule circulating apparatus comprising: a vibratory conveying unit adapted by arcuate oscillation to maintain said granules in a state of agitation and to convey said granules; a sifting unit connected with said vibratory conveying unit to vibrate in unison therewith and to receive said granules therefrom; driving means; means operably connecting said driving means with said units for causing rapid arcuate oscillation of said units; and elevator means for returning granules sifted by said sifting unit to said vibratory conveying unit.

'7. In a machine wherein shingles are marginally coated with liquified asphaltic compounds and subsequently dipped into mineral granules, granule circulating apparatus comprising: a vibratory conveying unit adapted by arcuate oscil-. lation to maintain said granules in a state of agitation and to convey said granules; a sifting unit connected with said vibratory conveying unit to vibrate in unison therewith and to receive said granules therefrom; driving means; means impositively and resiliently connecting said driving means with said units for causing rapid arcuate oscillation of said units; and elevator means for returning granules sifted by said sifting unit to saidyibratory conveying unit.

8. In a machine wherein shingles are marginally coated with liquifled asphaltic compounds and subsequently dipped into mineral granules, granule circulating apparatus comprising: a vibratory conveying unit adapted by arcuate oscillation to maintain said granules in a state of agitation and to' convey said granules; a sifting unit connected with said vibratory conveying unit to vibrate in unison therewith and to receive said granules therefrom; driving means; a member rigidly connected with said units; a pitman on said driving means slidably engageable with said member; spring means operably connecting said pitman and said member for resiliently transmitting the oscillation of said pitman to said member and biased to transmit said oscillation with greater force in one direction than in 9. In a machine wherein shingles are marginally coated with liquified asphaltic compounds and subsequently dipped into mineral granules, granule circulating apparatus comprising: a vibratory conveying unit adapted by arcuate oscillation to maintain said granules in a state of agitation and to convey said granules; a sifting unit connected with said vibratory conveying unit to vibrate in unison therewith and to receive said granules therefrom; driving means; a collar movable with said units; a pitman on said driving compression springs on said pitman on each side of said collar, one of said springs having greater strength than the other; nuts on said threaded portions adjustably holding said springsagainst said collar, whereby the oscillation of said pitman is transmittable to said collar through said.

springs; and elevator means for returning granules sifted by said sifting unit to said vibratory conveying unit.

10. In a machine wherein shingles are marginally coated with liquified asphaltic compounds and subsequently dipped into mineral granules, granule circulating apparatus comprising: a vibratory conveying unit adapted by arcuate oscillation to maintain said granules in a state of agitation and to convey said granules toward a discharge point; a sifting unit connected with said vibratory conveying unit to vibrate in unison therewith and to receive said granules therefrom; driving means; a collar movable with said units; a pitman on said driving means extending slidably through said collar and having threaded portions on each side thereof; compression springs on said pitman on each side of said collar; nuts on said threaded portions adjustably holding said springs against said collar, whereby the oscillation of said pitman is transmittable to said collar through said springs, that one of said springs transmitting said oscillation in the direction moving said vibrating conveying unit away from said discharge point being stronger than the other of said springs; and elevator means for returning granules sifted by said sifting unit to said vibratory conveying unit.

11. In a machine wherein shingles are marginally coated with 'liquifled asphaltic compounds and subsequently dipped into mineral granules, granule circulating apparatus comprising: a vibratory conveying and sifting unit inclusive of a trough, sifting means posited to receive said granules by gravity from one end of said trough, a shaft, rocker arms pivotally connected to said trough and said sifting means and pivotally the opposite direction; and elevator means for returning granules sifted by said sifting unit to said vibratory conveying unit.

mounted intermediate thereof upon said shaft and a collar adjacent one end of said rocker arms; driving means; a pitman on said driving means extending slidably through said collar and having threaded portions on each side thereof; compression springs on said pitman on each side of said collar; nuts on said threaded portions adjustably holding said springs against said collar, whereby oscillating movement of said pitman is transmittable to said collar through said springs to cause arcuate oscillation of said unit; that one-of said springs transmitting said oscillating movement in the direction moving ginally coated with liquified asphaltic compounds REFERENCES CITED and subsequently dipped into mineral granules,

granule circulating apparatus comprising: a The following referencesrme record in the vibratory conveying unit adapted by arcuate file of this B -mi:

oscillation to maintain said granules in a state 5 UNITEDBTAq-ES PATENTS of agitation and to convey said granules; a sifting unit associated with said vibratory conveying Number Name Date unit to receive said granules therefrom; and ele- 2094787 mint 1937 vator means for returning granules sifted by 2,233,446 Murphy 1941 said sifting unit to said vibratbry conveying 10 2,30 ,471 Moore 1943 unit.

WEBS'I'ER S. SIDWELL. 

